assertNull("Retrieved Interface should be null if interface attribute unspecified -", retrievedInterface);
// getInterface() - interface attribute specified, and hierarchy in place:
// Set the "interface" attribute to reference the new Interface Element
// (have to recreate whole desc hierarchy as toComponent() will not rerun if already run!)
desc = factory.newDescription();
interfaceElement = desc.addInterfaceElement();
interfaceElement.setName(new NCName("interface1"));
fBindingElement = desc.addBindingElement();
fBindingElement.setName(new NCName("binding1"));
fBindingElement.setInterfaceName(new QName("interface1"));